Ultrasonic sensor
AssigneeMurata Manufacturing Co., Ltd.
InventorsTomoaki MATSUSHITA, Kazuhiro EBARA
Life of this patent
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Abstract
An ultrasonic sensor includes a housing, a piezoelectric element on a bottom plate inside the housing, a signal terminal, and a flexible circuit. The flexible circuit is connected to the piezoelectric element and to an end portion of the signal terminal. A side wall includes a pair of thicker portions that oppose each other and a pair of thinner portions with a thickness less than that of the pair of thicker portions and that oppose each other. At least one of the thicker portions includes a recess at an inner surface thereof, and a portion of the flexible circuit is positioned inside the recess.
Claims12
An ultrasonic sensor comprising:
- a housing including a side wall with a hollow cylinder shape and a bottom plate at one end of the side wall;
- a piezoelectric element on the bottom plate inside the housing;
- a signal terminal including one end portion inside the housing and another end portion outside the housing;
- and
- a flexible circuit connected to the piezoelectric element and to the one end portion of the signal terminal;
- wherein
- the side wall includes a pair of thicker portions opposed to each other and a pair of thinner portions opposed to each other and having a thickness less than that of the pair of thicker portions;
- and
- at least one of the thicker portions includes a recess at an inner surface thereof;
- and
- a portion of the flexible circuit is positioned inside the recess.
Dependencies are inferred from the claim text.